Year	Percent
1950	9.97451
1955	10.18262
1960	10.29441
1965	10.19675
1970	9.7086
1975	9.81597
1980	9.97721
1985	10.08457
1990	10.10957
1995	10.14085
2000	10.25105
2005	10.27366
2010	10.2496
2015	10.22409
2020	10.50543
2025	10.86263
2030	11.02266
2035	10.85559
2040	10.64345
2045	10.47368
2050	10.27751
2055	10.01032
2060	9.65161
2065	9.25858
2070	8.87605
2075	8.50566
2080	8.17615
2085	7.83028
2090	7.4967
2095	7.1868
2100	6.8863